101 citations · 194 across the 4 of their papers we have counts for
12 papers
Gravitational portals in the early Universe
Simon Clery, Yann Mambrini, Keith A. Olive +1
We consider the production of matter and radiation during reheating after inflation, restricting our attention solely to gravitational interactions. Processes considered are the ex…
BICEP/Keck Constraints on Attractor Models of Inflation and Reheating
John Ellis, Marcos A. G. Garcia, Dimitri V. Nanopoulos +2
Recent BICEP/Keck data on the cosmic microwave background, in combination with previous WMAP and Planck data, impose strong new constraints on the tilt in the scalar perturbation s…
Slow and Safe Gravitinos
Emilian Dudas, Marcos A. G. Garcia, Yann Mambrini +3
It has been argued that supergravity models of inflation with vanishing sound speeds, , lead to an unbounded growth in the production rate of gravitinos. We consider several m…
Building Models of Inflation in No-Scale Supergravity
John Ellis, Marcos A. G. Garcia, Natsumi Nagata +3
After reviewing the motivations for cosmological inflation formulated in the formalism of supersymmetry, we argue that the appropriate framework is that of no-scale supergravity. W…
Non-Oscillatory No-Scale Inflation
John Ellis, Dimitri V. Nanopoulos, Keith A. Olive +1
We propose a non-oscillatory no-scale supergravity model of inflation (NO-NO inflation) in which the inflaton does not oscillate at the end of the inflationary era. Instead, the Un…
The case for decaying spin-3/2 dark matter
Marcos A. G. Garcia, Yann Mambrini, Keith A. Olive +1
We couple a sterile neutrino sector to a spin-3/2 particle and show that with a Planck reduced coupling, we can obtain a sufficiently long lifetime making the spin-3/2 particle a g…